Tara Gregson is a wife and mother of two. Tara has dissociative identity disorder (DID). Whenever she is stressed, she transforms into one of her alternate personalities: wild and flirty teenager T; old-fashioned housewife Alice; and male, loud, beer-drinking Vietnam vet Buck (a fifth personality is introduced later in the season). Tara is supported by her husband Max, her somewhat troubled teenage daughter Kate and quirky, good-hearted gay son Marshall. Her sister, Charmaine, is not so supportive, often expressing her doubt about the validity of Tara's disorder.